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SEASONAL FLUCTUATIONS OF THE CAROTENE (α, β) CONTENT IN FRESHWATER PHYTOPLANKTON
Author(s) -
Andre Cl.,
Vercruysse A.
Publication year - 1976
Publication title -
acta botanica neerlandica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0044-5983
DOI - 10.1111/j.1438-8677.1976.tb01084.x
Subject(s) - carotene , phytoplankton , environmental science , content (measure theory) , oceanography , ecology , biology , mathematics , food science , geology , nutrient , mathematical analysis
SUMMARY The total (α + β) carotene and the chlorophyll a content of fresh water phytoplancton were measured spectrophotometrically and were found to be higher during autumn and a part of the winter (100 to 200 μg/l chlorophyll a and 4 to 6 μg/l total (α and β) carotene) with maxima during December and January. From March to June the content decreased continuously from 50 μg to 20 μg (or even 10 μg/l) chlorophyll a and from 5 μg to less than 1 μg/l total carotene (α + β). The ratio of the α‐carotene to the β‐carotene content, fluctuated periodically. During January to May more α‐carotene than β‐carotene was found and during the rest of the sampling period more β‐ than α‐carotene.